Tweaks to constants and support for ROTATE
Tweaks to constants and support for ROTATE

Move constants around, add a few for bluetooth name and such,
reduce default APA_MHZ to something more sane,
and add a ROTATE constant to support LEDs in columns instead of rows.
To simplify, I'm retiring the custom fillRow/fillCol logic and just
letting everything use setAt().

hobzcalvin/blume,hobzcalvin/blume,hobzcalvin/blume,hobzcalvin/blume